Question: Which unit of time starts with the letter "y" and measures physical quantity or duration?
Paraphrase: Which unit of time begins with the letter "y" and measures physical quantity or duration?
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q1790144 . ?sbj wdt:P111 wd:Q2199864 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 'y')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: yoctosecond, yoctosecond, yottasecond, yottasecond, year, year